Finding the Third Proportional to 129,802.50 and 278,397

Step by Step Solution

1. Step 1: Write the proportion equation
   129,802.50 : 278,397 = 278,397 : x
2. Step 2: Convert to fraction form
   129,802.50/278,397 = 278,397/x
3. Step 3: Cross multiply
   129,802.50x = 278,397 × 278,397
4. Step 4: Simplify right side
   129,802.50x = 77,504,889,609
5. Step 5: Solve for x
   x = 77,504,889,609/129,802.50
6. Step 6: Final answer
   x = 597,098.59